PETRONAS Tutela ACTIFULL OT CONCENTRATE is an OAT (Organic Acid Technology) coolant developed for Tier 4 engine using Selective Catalytic Reduction (SCR). Formulated to provide high grade protection for new generation low emissions engines, it can also be used for other engine types if compatible with OAT type coolants. Tutela ACTIFULL OT allows extended life and, therefore, longer coolant change intervals. Does not require the use of supplemental coolant additives (SCAs). Do not mix products of different brand or type